Vitamin B assists in red-blood-cell regeneration.
维生素B有助于红细胞的再生。
You are asked to swallow a capsule containing vitamin B.
你被要求吞下一颗含维生素B的胶囊。
The different types are designated by the letters A, B and C.
不同的类型分别用字母A、B和C标明。
The best evidence to date concerns folate, one of the B vitamins.
迄今为止最好的证据是叶酸，即维生素B的一种。
In the observational studies we found that some of the B vitamins were beneficial.
在观察性研究中，我们发现一些维生素B是有益的。
Fruits and vegetables are good for our health as they are rich in vitamins B or C.
水果和蔬菜对我们的健康有好处，因为它们富含维生素B或维生素C。
Three other types of airspace, Classes D, C and B, govern the vicinity of airports.
其他三种领空，D、C和B类，管理着机场周围地区。
Reverse spelling (crumb for crum, a word in which b has no justification) is also a trivial mistake.
反向拼写（crum 拼成 crumb，b在这里没有理由存在）也是微不足道的错误。
After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.
听到问题后，必须从A、B、C、D四个选项中选出最佳选项。
In the A, B, C, D and F grading system, the first four letters are typically considered passing grades.
在A、B、C、D和F评分体系中，前四个字母通常被认为是及格。
Orientation is simply facing in the right direction; navigation involves finding ones way from point A to point B.
定向只是面向正确的方向；导航包括找到从A点到B 点的路线。
To enter Class B airspace, such as an approach to a major metropolitan airport, an explicit ATC clearance is required.
需要持有明确的空中交通管制许可才能进入B类空域，如接近一个大都会机场。
To prove that factor a has no effect whatever on outcome b may be important in the sense that it refutes a hypothesis.
证明因素a对结果b没有任何影响可能是重要的，因为它驳斥了一个假设。
He was probably stationed in this provincial trading port, founded in 46 B. C. as a colony for veterans of the Roman army.
他可能驻扎在这个作为罗马军队退伍军人殖民地的省贸易港，该贸易港于公元前46年建立。
Understand what she's trying to accomplish and propose a Plan B that will make it happen without destroying what you've done so far.
了解她想要实现的目标，并提出一个B计划，在不破坏你目前所做的事情的前提下实现它。
They went on disputing till Brother B said he would bet twenty thousand pounds that the man would live thirty days, anyway, on that million, and keep out of jail, too.
他们就这样继续争论下去，直到B大哥说他愿意下两万英镑的赌注，赌这个人靠这一百万反正能活三十天，而且还不会进监狱。
The hard volcanic stone was a resource that had been in great demand for many years, at least since the rise of the Olmecs (a people who flourished between 1200 and 400 B.
坚硬的火山岩是一种多年来需求量很大的资源，至少从奥尔梅克人（一种生活在公元前1200年至400年之间的民族）崛起以来是这样。
At the end of the video, the camera spirals around the building overhead as the broad logo appears on the screen: a lowercase b that wraps around itself in an imitation of the @ symbol.
在视频的最后，摄像机绕着建筑物盘旋在头顶，很大的标志出现在屏幕上：一个类似于@的符号围绕着一个小写的b。
For each of them there are four choices marked A, B, C and D. You should decide on the best choice and mark the corresponding letter on Answer Sheet 2 with a single line through the centre.
每题都有对应标记的A、B、C和D四个选项，请选择最佳选项并在答题卡2的相应字母中间划横线。
Meanwhile B cells will remember them for the next kill.
与此同时，B细胞会记住它们，以便下次的杀灭。
Slat and his team are working to improve System 001/B.
斯拉和他的团队正在努力改进 001/B 系统。
The question is: without enough these viruses how can B cells remember them?
问题是：没有足够的病毒，B细胞如何记住它们？
Between 221 and 210 B. C., he started the building of the Great Wall.
公元前221年至公元前210年，他开始修建长城。
After seven years of tests, on October 2nd, 2019, a machine called System 001/B came out.
经过7年的测试，2019年10月2日，一台名为“ 001/B 系统”的机器问世了。
"Having a little brother isn't so bad," Lucy told Senator, "if you show him who's b-o-s-s!"
“有个小弟弟也不是什么坏事，”露西对塞纳托尔说，“只要你让他知道谁是老大！”
The immune system will know what the "viruses" look like, and send B cells (lymphocytes) or antibodies to find and kill them.
免疫系统将识别“病毒”的样子，并派遣B细胞（淋巴细胞）或抗体去找到并杀死它们。
A vaccine may also give us passive immunity by providing B cells taken from an animal or a human to play the same role.
疫苗也可以通过提供取自动物或人身上的B细胞来发挥同样的作用，从而使我们获得被动免疫。
He says that brain change is strongest when a) you are interested in and like what you are learning, b) you are in control of what you learn and c) you get challenging tasks that make you think hard.
他说，当你 a）对你正在学习的东西感兴趣并且喜欢它，b）你能控制你所学的东西，c）你接受有挑战性、让你努力思考的任务时，大脑的变化是最剧烈的。
Pinocchio sells his A-B-C book to pay his way into the Marionette Theater.
皮诺乔卖掉了他的识字课本，付了钱进了木偶剧院。
In his hands he had the A-B-C book for his son, but the old coat was gone.
他手里拿着给儿子的识字课本，但是那件旧外套不见了。
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